MIUI v4.1 JB 3.2.8 For TMobile Samsung Galaxy S-III
Place ROM zip file in your SD card
Create a backup
Factory reset device and wipe caches
Install zip from SD card
Reboot and enjoy!
I changed the build.prop and updater script to reflect T Mobile from my AT&T build.
If you have any issues let me know just encase I missed something
MIUI.us Team and IRC
Disclaimer: I'm not responsible for your bricked units if you do not install properly...if you are not sure what MiUi US is please search it and you will find a vast amount of info...
Update highlights of MIUI ROM 3.1.11
Not much has changed